Measurements of inclusive W and Z cross sections in p(p)over-bar collisions at √s=1.96 TeV

被引：180

作者：

Abulencia, A. ^{[1
]}

Acosta, D. ^{[2
]}

Adelman, J. ^{[3
]}

Affolder, T. ^{[4
]}

Akimoto, T. ^{[5
]}

Albrow, M. G. ^{[6
]}

Ambrose, D. ^{[6
]}

Amerio, S. ^{[7
]}

Amidei, D. ^{[8
]}

Anastassov, A. ^{[9
]}

Anikeev, K. ^{[6
]}

Annovi, A. ^{[10
,11
]}

Antos, J. ^{[12
]}

Aoki, M. ^{[5
]}

Apollinari, G. ^{[6
]}

Arguin, J-F ^{[13
,14
]}

Arisawa, T. ^{[15
]}

Artikov, A. ^{[16
]}

Ashmanskas, W. ^{[6
]}

Attal, A. ^{[17
]}

Azfar, F. ^{[18
]}

Azzi-Bacchetta, P. ^{[7
]}

Azzurri, P. ^{[10
,11
]}

Bacchetta, N. ^{[7
]}

Bachacou, H. ^{[19
]}

Badgett, W. ^{[6
]}

Barbaro-Galtieri, A. ^{[19
]}

Barnes, V. E. ^{[20
]}

Barnett, B. A. ^{[21
]}

Baroiant, S. ^{[22
]}

Bartsch, V. ^{[23
]}

Bauer, G. ^{[24
]}

Bedeschi, F.

Behari, S. ^{[21
]}

Belforte, S. ^{[25
]}

Bellettini, G. ^{[10
,11
]}

Bellinger, J. ^{[26
]}

Belloni, A. ^{[24
]}

Ben-Haim, E. ^{[6
]}

Benjamin, D. ^{[27
]}

Beretvas, A. ^{[6
]}

Beringer, J. ^{[19
]}

Berry, T. ^{[28
]}

Bhatti, A.

Binkley, M. ^{[6
]}

Bisello, D. ^{[7
]}

Bishai, M. ^{[6
]}

Blair, R. E. ^{[29
]}

Blocker, C.

Bloom, K. ^{[8
]}

机构：

[1] Univ Illinois, Urbana, IL 61801 USA

[2] Univ Florida, Gainesville, FL 32611 USA

[3] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

[4] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA

[5] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan

[6] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[7] Univ Padua, Ist Nazl Fis Nucl, Sez Padova Trento, I-35131 Padua, Italy

[8] Univ Michigan, Ann Arbor, MI 48109 USA

[9] Rutgers State Univ, Piscataway, NJ 08855 USA

[10] Univ Pisa, Ist Nazl Fis Nucl, I-56127 Siena, Italy

[11] Scuola Normale Super Pisa, I-56127 Siena, Italy

[12] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[13] McGill Univ, Inst Particle Phys, Montreal, PQ H3A 2T8, Canada

[14] Univ Toronto, Toronto, ON M5S 1A7, Canada

[15] Waseda Univ, Tokyo 169, Japan

[16] Joint Nucl Res Inst, RU-141980 Dubna, Russia

[17] Univ Calif Los Angeles, Los Angeles, CA 90024 USA

[18] Univ Oxford, Oxford OX1 3RH, England

[19] Ernest Orlando Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[20] Purdue Univ, W Lafayette, IN 47907 USA

[21] Johns Hopkins Univ, Baltimore, MD 21218 USA

[22] Univ Calif Davis, Davis, CA 95616 USA

[23] UCL, London WC1E 6BT, England

[24] MIT, Cambridge, MA 02139 USA

[25] Univ Trieste, Ist Nazl Fis Nucl, Udine, Italy

[26] Univ Wisconsin, Madison, WI 53706 USA

[27] Duke Univ, Durham, NC 27708 USA

[28] Univ Liverpool, Liverpool L69 7ZE, Merseyside, England

[29] Argonne Natl Lab, Argonne, IL 60439 USA

[30] Univ Rochester, Rochester, NY 14627 USA

[31] Univ Pittsburgh, Pittsburgh, PA 15260 USA

[32] Michigan State Univ, E Lansing, MI 48824 USA

[33] Univ Glasgow, Glasgow G12 8QQ, Lanark, Scotland

[34] Univ Geneva, CH-1211 Geneva 4, Switzerland

[35] Univ Bologna, Ist Nazl Fis Nucl, I-40127 Bologna, Italy

[36] Univ Autonoma Barcelona, Inst Fis Altes Energies, E-08193 Barcelona, Spain

[37] Kyungpook Natl Univ, Ctr High Energy Phys, Taegu 702701, South Korea

[38] Seoul Natl Univ, Seoul 151742, South Korea

[39] Sungkyunkwan Univ, Suwon 440746, South Korea

[40] Harvard Univ, Cambridge, MA 02138 USA

[41] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[42] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[43] Univ Cantabria, CSIC, Inst Fis Cantabria, E-39005 Santander, Spain

[44] Univ Rome, Ist Nazl Fis Nucl, Sez Roma 1, I-00185 Rome, Italy

[45] Baylor Univ, Waco, TX 76798 USA

[46] Univ Karlsruhe, Inst Expt Kernphys, D-76128 Karlsruhe, Germany

[47] Ohio State Univ, Columbus, OH 43210 USA

[48] Yale Univ, New Haven, CT 06520 USA

[49] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 305, Japan

[50] Univ New Mexico, Albuquerque, NM 87131 USA

来源：

JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2007年 / 34卷 / 12期

基金：

英国科学技术设施理事会;

关键词：

D O I：

10.1088/0954-3899/34/12/001

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We report the first measurements of inclusive W and Z boson cross-sections times the corresponding leptonic branching ratios for pp collisions at root s = 1.96 TeV based on the decays of the W and Z bosons into electrons and muons. The data were recorded with the CDF II detector at the Fermilab Tevatron and correspond to an integrated luminosity of 72.0 +/- 4.3 pb(-1). We test e-mu lepton universality in W decays by measuring the ratio of the W -> mu nu to W -> e nu cross sections and determine a value of 0.991 +/- 0.004(stat.) +/- 0.011(syst.) for the ratio of W - l - nu couplings (g(mu)/g(e)). Since there is no sign of non-universality, we combine our cross-section measurements in the different lepton decay modes and obtain sigma(W) x Br(p (p) over bar -> W -> l nu) = 2.749 +/- 0.010(stat.) +/- 0.053(syst.) +/- 0.165(lum.) nb and sigma(gamma*/Z) x Br(p (p) over bar ->gamma*/Z -> ll) = 254.9 +/- 3.3( stat.) +/- 4.6( syst.) +/- 15.2(lum.) pb for dilepton pairs in the mass range between 66 GeV/c(2) and 116 GeV/c2. We compute the ratio R of the W -> l nu to Z -> ll cross sections taking all correlations among channels into account and obtain R = 10.84 +/- 0.15(stat.) +/- 0.14(syst.) including a correction for the virtual photon exchange component in our measured. gamma*/Z -> ll cross section. Based on the measured value of R, we extract values for the W leptonic branching ratio, Br(W -> l nu) = 0.1082 +/- 0.0022; the total width of the W boson, Gamma(W) = 2092 +/- 42 MeV; and the ratio of W and Z boson total widths, Gamma(W)/Gamma( Z) = 0.838 +/- 0.017. In addition, we use our extracted value of Gamma(W) whose value depends on various electroweak parameters and certain CKM matrix elements to constrain the V-cs CKM matrix element, |V-cs| = 0.976 +/- 0.030.

引用

页码：2457 / 2544

页数：88

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